JP2010251133A - Circuit of electric shock preventing socket - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To achieve the purpose of an electric shock preventing socket by controlling switching on and off of the power supply of the socket, and to provide the circuit of the electric shock preventing socket having high safety and convenience when using it. <P>SOLUTION: This circuit 100 of the electric shock preventing socket includes a power supply unit 1, a detection unit 2, and a switch unit 3. The power supply unit 1 lowers and rectifies the input voltage of the power supply, outputs the voltage, and provides it for the detection unit 2 and the switch unit 3. The detection unit 2 determines whether or not the pins of a plug are accurately inserted in an insertion opening by utilizing dispatch and reception of a detection beam, and thereby transmits a switch control signal. The switch unit 3 receives the switch control signal, and controls an inductance type switch component S1 to switch it on and off. Thereby, the electric shock preventing socket provides or does not provide the power supply. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a circuit, and more particularly to a circuit for an electric shock prevention socket.

  With the widespread use of home appliances, sockets are becoming a necessity in every household. However, children are curious and may inadvertently get an electric shock when nails, copper wires, or other items are inserted into the socket holes and the user inserts the plug into the socket. is there.

  For safety reasons, sockets are often equipped with a protective mechanism to prevent electric shock. The electric shock prevention socket disclosed in Patent Document 1 includes a base plate, a base body fitted on the base plate, a large number of electrodes, and a large number of insulating blocks. An insertion hole is opened on the base. The electrode is placed on the base and is located below the insertion hole located on the base plate. The insulating block is installed between the insertion hole and the electrode, and a hole corresponding to the insertion hole on the base plate is opened through the insulating block vertically. When the insertion connection terminal of the plug is not completely inserted into the electric shock prevention socket, the insertion connection terminal contacts only the insulating block and does not energize the electric shock prevention socket. Thus, the electric shock prevention socket can achieve the electric shock prevention effect.

  The electric shock preventing socket posted in Patent Document 2 includes an outer shell, an insertion hole, a metal contact piece, and a conductive wire. On the outer shell surface, a circular screw mountain tank is formed corresponding to each insertion port, and the center of the screw mountain tank is the center of the insertion port. A rotating lid is connected to the screw mountain on the surface of the screw mountain tank, and a pair of insertion openings are opened on the surface of the rotating lid. The insertion port and the outer shell insertion port have the same size, position, and distance. A protrusion guard plate is formed at the edge position in the screw yama tub on the outer shell, and the protrusion guard plate is also provided on the inner wall of the rotary lid. A spring connection is made between the two guard plates. When energizing, first, the plug is inserted into the insertion opening on the surface of the rotary lid, the spring is pressed, and the rotary lid is rotated. When the rotary lid insertion port and the outer shell insertion port overlap, the plug is inserted downward into the outer shell insertion port, contacts the metal contact piece, and energizes. Thus, the purpose of preventing electric shock is achieved.

  However, both the structure of the insertion port guard part and the structure of the rotary lid insertion port achieve the purpose of preventing electric shock by the mechanical structure, so that the safety is inferior and the convenience of use is low.

Specification of People's Republic of China Patent No. 200820105388 Specification of the People's Republic of China Patent No. 200720014111

An object of the present invention is to provide an electric shock-proof socket circuit that is installed in a socket, improves the safety of the socket, and is highly convenient to use.
The circuit of the electric shock prevention socket includes a power supply unit, a detection unit, and a switch unit. The power supply unit lowers, rectifies, and outputs a voltage of the input power supply, and outputs the voltage to the detection unit and the switch unit. And the detection unit utilizes sending and receiving of the detection beam to determine whether the pin of the plug has been correctly inserted into the insertion port, thereby issuing a switch control signal, The switch control signal is received, and based on the switch control signal, the inductor type switch is controlled to be turned on or off, so that the electric shock prevention socket does not provide or provide power.

The invention of claim 1 utilizes an optical detection method, determines whether or not the electrode pin of the plug is correctly inserted into the insertion slot, determines whether or not to provide power, and thus increases the safety of power supply. Achieve
The electric shock prevention socket circuit includes a power supply unit, detection unit, and switch unit.
The power supply unit lowers the voltage of the input power supply, rectifies, outputs the voltage, and provides the detection unit and the switch unit,
The detection unit detects whether or not the pin of the plug has been correctly inserted into the insertion slot, and thereby transmits a control signal. The detection unit further includes a light emitting unit and a light receiving unit. The light emitting unit sends a detection light beam to the light receiving unit, the switch unit receives a control signal sent by the detection unit, and controls conduction or interruption of the power supply of the socket based on the control signal. Thus, the electric shock prevention socket circuit is characterized by determining whether or not to supply power to the socket.
According to a second aspect of the present invention, in the electric shock prevention socket circuit according to the first aspect, the power supply unit includes a voltage drop circuit, a rectifying filter circuit, and a voltage stabilizing circuit,
The voltage drop circuit reduces the voltage of power input from the outside,
The rectifying filter circuit converts the AC power output from the voltage drop circuit to DC power, and then performs filtering on the voltage,
The voltage stabilizing circuit is a circuit of an electric shock prevention socket characterized by stabilizing the voltage output from the rectifying filter circuit.
According to a third aspect of the present invention, in the circuit of the electric shock prevention socket according to the first aspect, the light emitting unit in the detection unit includes a set of light emitting components,
The light receiving unit includes a set of photosensitive parts,
The set of light emitting components and the set of photosensitive components are installed on opposite sides of the insertion slot,
When the one set of photosensitive parts does not receive the detection light beam of the one set of light emitting parts, a control signal for conducting a switch is transmitted to the switch unit.
According to a fourth aspect of the present invention, in the electric shock prevention socket circuit according to the first aspect, the switch unit includes an inductor-type switch component, a first switch unit, and a second switch unit.
When the inductor type switch component is conductive, the electric shock prevention socket outputs power, and when the inductor type switch component is turned off, the electric shock prevention socket does not output power,
When the first switch component is conductive and the second switch component is off, the inductor type switch component is turned off due to the absence of a magnetic field,
When the first switch component is off and the second switch component is conductive, the inductor-type switch component receives a magnetic field and is in a conductive state.
According to a fifth aspect of the present invention, in the circuit of the electric shock prevention socket according to the third aspect, the switch unit further includes a light emitting unit,
The light-emitting unit is a circuit of an electric shock prevention socket characterized in that the inductor-type switch component emits light when it becomes conductive due to the presence of a magnetic field.

  The electric shock prevention socket of the present invention uses an optical detection method, and the detection unit determines whether or not the pin of the plug is correctly inserted into the insertion port, and sends a control signal based on this, and the switch unit controls the control unit. Since the signal is received and the conduction and shut-off of the power supply are controlled based on the control signal, thus achieving the purpose of preventing electric shock, safety and convenience of use are high.

1 is a circuit diagram of an electric shock prevention socket according to an embodiment of the present invention.

  As shown in FIG. 1, the electric shock prevention socket circuit 100 of the present invention includes a power supply unit 1, a detection unit 2, and a switch unit 3. The power supply unit 1 includes a voltage drop circuit 11, a rectifying filter circuit 12, and a voltage stabilization circuit 13. The voltage drop circuit 11 includes a voltage drop capacitor C1 and a first resistor R1 connected in parallel. A power input live line end Lin is electrically connected to one end of the voltage drop capacitor C1 and the first resistor R1, and a rectifying filter circuit 12 is electrically connected to the opposite end of the voltage drop capacitor C1 and the first resistor R1. Connecting. The voltage drop circuit 11 reduces the voltage of the external power supply.

  The rectifying filter circuit 12 includes a first rectifying diode BD1, a second rectifying diode BD2, a third rectifying diode BD3, and a fourth rectifying diode BD4 that are connected to each other. The negative electrode of the first rectifier diode BD1 is electrically connected to one end of the voltage drop capacitor C1 and the first resistor R1. The positive electrode of the first rectifier diode BD1 and the positive electrode of the third rectifier diode BD3 are grounded. The negative electrode of the third rectifier diode BD3 and the positive electrode of the fourth rectifier diode BD4 are electrically connected to the power input null line end Nin. The negative electrode of the second rectifier diode BD2 and the negative electrode of the fourth rectifier diode BD4 are electrically connected to the voltage stabilizing circuit 13. The negative electrode of the second rectifier diode BD2 and the negative electrode of the fourth rectifier diode BD4 are further electrically connected to the positive electrode of the filter capacitor C2. The opposite end of the filter capacitor C2 is grounded. The filter capacitor C2 filters the voltage output from the rectifying filter circuit 12.

  The voltage stabilization circuit 13 includes a first voltage stabilization diode D1 and a second voltage stabilization diode D2 that are connected in parallel to each other. A second resistor R2 is connected between the rectifying filter circuit 12 and the voltage stabilizing circuit 13. One end of the second resistor R2, the negative electrode of the second rectifier diode BD2, and the negative electrode of the fourth rectifier diode BD4 are connected to each other, and the opposite end of the second resistor R2, the first voltage stabilizer diode D1, and the second voltage stabilizer The diodes D2 are connected to each other. The voltage stabilizing circuit 13 stabilizes the voltage output from the rectifying filter circuit 12. The power supply unit 1 adjusts the input power supply and provides a specific voltage to the detection unit 2 and the switch unit 3.

  The detection unit 2 includes a light emitting unit 21 and a light receiving unit 22 that are opposed to each other. The light emitting unit 21 includes a first light emitting component E1, a second light emitting component E2, and a third light emitting component E3 that are connected in parallel to each other. One end of the light emitting unit 21 is grounded, and the third resistor R3 is connected to the other end. The opposite end of the third resistor R3 is electrically connected to one end of the second voltage stabilizing diode D2. The 1st light emitting component E1, the 2nd light emitting component E2, and the 3rd light emitting component E3 in a present Example are infrared emitters.

  The light receiving unit 22 includes a first photosensitive component T1, a second photosensitive component T2, and a third photosensitive component T3 that are connected in parallel to each other. A fourth register R4 is connected to one end of the light receiving unit 22. The opposite end of the fourth resistor R4 is electrically connected to one end of the second voltage stabilizing diode D2. The fifth resistor R5 is connected to the opposite end of the light receiving unit 22, and the opposite end of the fifth resistor R5 is grounded. The positions of the first photosensitive component T1, the second photosensitive component T2, the third photosensitive component T3, the first light emitting component E1, the second light emitting component E2, and the third light emitting component E3 are opposite to each other, and both sides of the socket insertion opening. Located in. In this embodiment, the first photosensitive component T1, the second photosensitive component T2, and the third photosensitive component T3 are photoresists.

  The switch unit 3 includes a current conducting diode D3, a light emitting unit D4, a first switch unit Q1, a second switch unit Q2, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, and an inductor type switch component S1. In the present embodiment, the first switch unit Q1 and the second switch unit Q2 are transistors. One end of the seventh resistor R7 and the collector pole of the second switch unit Q2 are connected to each other, and the other end and the emitter pole of the second switch unit Q2 are connected to each other and grounded. The base electrode of the second switch unit Q2 and one end of the fifth resistor R5 are connected to each other. One end of the sixth resistor R6, the collector electrode of the second switch unit Q2, the base electrode of the first switch unit Q1, and one end of the seventh resistor R7 are electrically connected, and the other end is the second voltage stabilizing diode D2. It is electrically connected to one end. The base electrode of the first switch unit Q1 and one end of the seventh resistor R7 are connected, the emitter electrode is grounded, the collector electrode is connected to one end of the current conducting diode D3, and the opposite end of the current conducting diode D3 is Electrically connected to the two-voltage stabilizing diode D2. The current conducting diode D3 can conduct a circulating current when the first switch unit Q1 is off, thus protecting the first switch unit Q1.

  In this embodiment, the inductor type switch component S1 is an electromagnetic breaker. One end of the switch in the inductor type switch component S1 is electrically connected to the power input live line end Lin, and the opposite connection end and one end of the eighth resistor R8 are connected to each other. One end of the eighth register R8 is connected to the power output live line end Lout, and the other end is electrically connected to the light emitting unit D4. The opposite end of the light emitting unit D4 is connected to the power output null line end Nout and is electrically connected to the power input null line end Nin. When the plug is inserted into the socket, the power output live line end Lout and the power output null line end Nout are electrically connected to the pins of the external plug. The light emitting unit D4 in the present embodiment is a light emitting diode. The light emitting unit D4 becomes a switch indicator when the inductor type switch component S1 has a magnetic field and is in a conductive state.

  When the plug is not inserted into the insertion port of the socket, the detection light beams emitted from the first light emitting component E1, the second light emitting component E2, and the third light emitting component E3 are all corresponding to the first photosensitive component T1 and the second photosensitive component. It is received by the part T2 and the third photosensitive part T3. Thus, the current passes through the fifth resistor R5, and the high voltage control signal is transmitted to the second switch unit Q2. The high voltage control signal drives and conducts the second switch unit Q2, thus turning off the first switch unit Q1. Therefore, the inductor type switch component S1 is turned off when there is no magnetic field, and the power output live line end Lout does not output power, so that no current flows through the outlet. When the plug has less than three pins and is inserted into the socket (the pin is not inserted correctly into the socket's insertion slot, or a foreign object is inserted), current flows through the fifth resistor R5, and thus the socket is powered. Not output.

  When the plug is correctly inserted into the socket, detection light beams emitted from the first light emitting component E1, the second light emitting component E2, and the third light emitting component E3 that correspond to each other are blocked by the terminals of the plug. Thus, no current passes through the fifth resistor R5, and the second switch unit Q2 receives the low voltage control signal and enters a disconnected state. Thus, the current passes through the seventh resistor R7, and the first switch unit Q1 is made conductive. Therefore, the inductor type switch component S1 becomes conductive due to the presence of a magnetic field, the power output live line end Lout outputs the power, and the socket outputs the power.

  The electric shock prevention socket circuit 100 of the present invention determines whether or not the pin of the plug has been correctly inserted into the insertion port of the socket by the detection unit 2 sending and receiving the detection light beam. In this way, it is possible to control the conduction or interruption of the power supply of the socket, achieve the purpose of the electric shock prevention socket, and provide the user with safety and convenience of use.

100 Electric shock prevention socket circuit 1 Power supply unit 11 Voltage drop circuit 12 Rectification filter circuit 13 Voltage stabilization circuit C1 Voltage drop capacitor R1 First resistor R2 Second resistor BD1 First rectifier diode BD2 Second rectifier diode BD3 Third rectifier diode BD4 First Four rectifier diodes C2 Filter capacitor D1 First voltage stabilizing diode D2 Second voltage stabilizing diode 2 Detection unit 21 Light emitting unit 22 Light receiving unit E1 First light emitting component E2 Second light emitting component E3 Third light emitting component T1 First photosensitive component T2 Second photosensitive component T3 Third photosensitive component R3 Third resistor R4 Fourth resistor R5 Fifth resistor 3 Switch unit Q1 First switch unit Q2 Second switch unit S1 Inductor type switch component D3 Current conduction Diode D4 emitting unit R6 sixth resistor R7 seventh resistor R8 eighth resistor Lin power input live line terminal Nin power input null line terminal Lout power output live wire terminal Nout power output null line terminal

Claims (5)

Using the light detection method, determine whether the electrode pin of the plug has been correctly inserted into the insertion slot, determine whether to provide power, thus achieving the safety of power supply,
The electric shock prevention socket circuit includes a power supply unit, detection unit, and switch unit.
The power supply unit lowers the voltage of the input power supply, rectifies, outputs the voltage, and provides the detection unit and the switch unit,
The detection unit detects whether or not the pin of the plug has been correctly inserted into the insertion slot, and thereby transmits a control signal. The detection unit further includes a light emitting unit and a light receiving unit. The light emitting unit sends a detection light beam to the light receiving unit, the switch unit receives a control signal sent by the detection unit, and controls conduction or interruption of the power supply of the socket based on the control signal. And determining whether or not to provide power to the socket. The electric shock prevention socket circuit according to claim 1, wherein the power supply unit includes a voltage drop circuit, a rectifying filter circuit, and a voltage stabilizing circuit.
The voltage drop circuit reduces the voltage of power input from the outside,
The rectifying filter circuit converts the AC power output from the voltage drop circuit to DC power, and then performs filtering on the voltage,
The voltage stabilizing circuit stabilizes the voltage output from the rectifying filter circuit, and the electric shock preventing socket circuit. The circuit of the electric shock prevention socket according to claim 1, wherein the light emitting unit in the detection unit includes a set of light emitting components,
The light receiving unit includes a set of photosensitive parts,
The set of light emitting components and the set of photosensitive components are installed on opposite sides of the insertion slot,
A circuit for an electric shock prevention socket, wherein when the set of photosensitive parts does not receive the detection light beam of the set of light emitting parts, a control signal for conducting a switch is transmitted to the switch unit. The circuit of the electric shock prevention socket according to claim 1, wherein the switch unit includes an inductor type switch component, a first switch unit, and a second switch unit.
When the inductor type switch component is conductive, the electric shock prevention socket outputs power, and when the inductor type switch component is turned off, the electric shock prevention socket does not output power,
When the first switch component is conductive and the second switch component is off, the inductor type switch component is turned off due to the absence of a magnetic field,
When the first switch component is off and the second switch component is conductive, the inductor-type switch component receives a magnetic field and becomes conductive. The circuit of the electric shock prevention socket according to claim 3, wherein the switch unit further includes a light emitting unit,
The light emitting unit emits light when the inductor type switch component is in a conductive state due to the presence of a magnetic field.

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